They changed the stars

Josie watched in horror as the stars moved around in the night sky.
They swirled and whirled around for a few seconds before spreading back out again.
Up there, for all to see, was a message:
“DEAR FRED,
YOU SUCK.
SIGNED,
MISSY.”
The stars stayed like that for a minute, then they swirled and whirled around again until they returned to their original positions in the heavens.
Josie’s phone rang. She almost missed the call.
“Did you see that?” asked Sheldon.
“Yes,” said Josie. “I wonder if Fred saw it.”
“Who’s Fred?” asked Sheldon.
“I dunno,” said Josie. “Ask Missy.”